4results about How to "Improve defect detection performance" patented technology

The invention provides a surface defect detection method for aero-engine blades, and the method comprises the steps: sequentially shooting each blade, and splicing the blades into a panoramic image; due to the fact that the images are partially overlapped, the images can be sequentially spliced into the panoramic image according to the shooting sequence on the basis of the overlapped parts. The panoramic image not only contains enough defect information, but also can fuse a plurality of blades into the same image, so that the problem that the blades are difficult to match with the corresponding blades after the defects are identified is greatly reduced. Inputting the panoramic image into a recognition model added with a space-frequency dynamic convolution module, a Mangban module and a joint attention mechanism; and finally, outputting defect parts of all blades of the engine to finish identification. On the basis of the scheme, all defects on all the blades can be identified only by carrying out an identification process on the identification model once; the process has enough detection accuracy and does not need a large amount of calculation; and relatively high identification and blade quality detection efficiency can be kept.

An optical path device, an optical detection method and a detection device, the optical path device comprising a side incidence optical path assembly and a lens assembly, the side incidence optical path assembly comprising a detection light source and an expander mirror set, the detection light source providing an incident light beam, the expander mirror set being configured to spread and shape the incident light beam in a first direction to form parallel first direction detection light beams and to spread and shape the incident light beam in a second direction to form non-parallel second direction detection light beams; the first direction detection light beams exiting the lens assembly to form a light spot on a surface to be detected of an object to be detected; the second direction detection light beams non-parallelly entering a surface of the lens assembly and having a beam size, the second direction detection light beams exiting the lens assembly to the surface to be detected and forming the light spot. The present application provides a detection optical path avoiding a central aperture of the lens assembly, which can effectively reduce the risk of lens damage and achieve more reliable and efficient wafer defect detection.

This disclosure provides an AOI imaging system based on a TDI line scan camera for image acquisition of a display panel under inspection, relating to the field of display manufacturing. The system includes a TDI line scan camera, an illumination system, and a control system. The TDI line scan camera includes a first TDI line scan acquisition channel and a second TDI line scan acquisition channel. The illumination system includes a first illumination optical path and a second illumination optical path with different illumination effects. The control system is configured to: respond to an image acquisition trigger signal received by the AOI imaging system, control the first TDI line scan acquisition channel and the second TDI line scan acquisition channel to periodically alternate exposure, while simultaneously controlling the first illumination optical path and the second illumination optical path to periodically alternate illumination; and the first illumination optical path is illuminated simultaneously with the exposure of the first TDI line scan acquisition channel, and the second illumination optical path is illuminated simultaneously with the exposure of the second TDI line scan acquisition channel, so as to achieve the output of two illumination effects of the display panel under inspection in a single scan.

The utility model discloses an automatic identification device for panel glass surface defects, which comprises a detection platform, a light source system, an image acquisition module, an image processing unit and an adjustable mechanical support, the detection platform is provided with a three-dimensional adjusting seat, and the light source system comprises a multispectral light source assembly and a light path adjusting mechanism. The multispectral light source assembly integrates a visible light source, an infrared light source and an ultraviolet light source through an optical fiber array. Through fusion of multispectral light source integration, dynamic light path adjustment, precision mechanical positioning and edge computing technologies, an excitation-acquisition-processing full-link closed-loop system is constructed, and the bottlenecks of a traditional detection device in the aspects of multi-defect type adaptability, dynamic detection precision, environment anti-interference capability and the like are solved.